export interface SessionRecord {
    sessionId: string;
    startedAt: string;
    endedAt?: string;
    durationSeconds?: number;
    model?: string;
    source?: string;
    inputTokens: number;
    outputTokens: number;
    estimatedCostUsd?: number;
    messageCount: number;
    toolCallCount: number;
    toolCalls?: string;
}
export interface ModelBreakdown {
    model: string;
    sessions: number;
    totalInputTokens: number;
    totalOutputTokens: number;
    estimatedCostUsd: number;
}
export interface PlatformBreakdown {
    platform: string;
    sessions: number;
    totalInputTokens: number;
    totalOutputTokens: number;
}
export interface ToolBreakdown {
    tool: string;
    count: number;
    percentage: number;
}
export interface ActivityPattern {
    byDay: Record<string, number>;
    byHour: Record<number, number>;
    busiestDay: string;
    busiestHour: number;
    activeDays: number;
    maxStreak: number;
}
export interface TopSession {
    label: string;
    sessionId: string;
    value: number;
    date: string;
}
export interface InsightsReport {
    days: number;
    sourceFilter?: string;
    empty: boolean;
    generatedAt: string;
    overview: {
        totalSessions: number;
        totalInputTokens: number;
        totalOutputTokens: number;
        estimatedCostUsd: number;
        totalDurationSeconds: number;
        avgSessionDurationSeconds: number;
        totalMessages: number;
        totalToolCalls: number;
        dateRange?: {
            start: string;
            end: string;
        };
    };
    models: ModelBreakdown[];
    platforms: PlatformBreakdown[];
    tools: ToolBreakdown[];
    activity: ActivityPattern;
    topSessions: TopSession[];
}
export declare class InsightsEngine {
    private sessions;
    constructor(sessions?: SessionRecord[]);
    generate(days?: number, sourceFilter?: string): InsightsReport;
    private computeOverview;
    private computeModelBreakdown;
    private computePlatformBreakdown;
    private computeToolBreakdown;
    private computeActivityPatterns;
    private computeTopSessions;
    private emptyActivity;
    formatTerminal(report: InsightsReport): string;
    formatGateway(report: InsightsReport): string;
}
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